package com.tongcao.cn.inteceptor;

import com.alibaba.common.convert.Convert;
import com.alibaba.druid.util.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.PrintWriter;

/**
 * @Author:tongcao
 * @Date:2018/8/23 18:43
 * Description:
 */
@Component
public class MyIntecerptor implements HandlerInterceptor {

    private static final Logger log = LoggerFactory.getLogger(MyIntecerptor.class);


    @Override
    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
        log.info("---------------------开始进入请求地址拦截----------------------------");
        /**
         * Session 校验
         */
        Object userName = httpServletRequest.getParameter("userName");
        if (!StringUtils.isEmpty(Convert.asString(userName))) {
            return true;
        } else {
            PrintWriter printWriter = httpServletResponse.getWriter();
            printWriter.write("{code:0,message:\"session is invalid,please login again!\"}");
            return false;
        }
    }

    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
        log.info("--------------处理请求完成后视图渲染之前的处理操作---------------");
    }

    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
        log.info("---------------视图渲染之后的操作-------------------------0");
    }
}
